/* tables.c

   Tables of information... */

/*
 * Copyright (c) 2004-2009 by Internet Systems Consortium, Inc. ("ISC")
 * Copyright (c) 1995-2003 by Internet Software Consortium
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 *   Internet Systems Consortium, Inc.
 *   950 Charter Street
 *   Redwood City, CA 94063
 *   <info@isc.org>
 *   https://www.isc.org/
 *
 * This software has been written for Internet Systems Consortium
 * by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
 * To learn more about Internet Systems Consortium, see
 * ``https://www.isc.org/''.  To learn more about Vixie Enterprises,
 * see ``http://www.vix.com''.   To learn more about Nominum, Inc., see
 * ``http://www.nominum.com''.
 */

#include "dhcpd.h"

/* XXXDPN: Moved here from hash.c, when it moved to libomapi.  Not sure
   where these really belong. */
HASH_FUNCTIONS (group, const char *, struct group_object, group_hash_t,
    group_reference, group_dereference, do_string_hash)
HASH_FUNCTIONS (universe, const char *, struct universe, universe_hash_t, 0, 0,
    do_case_hash)
HASH_FUNCTIONS (option_name, const char *, struct option, option_name_hash_t,
    option_reference, option_dereference, do_case_hash)
HASH_FUNCTIONS (option_code, const unsigned *, struct option,
    option_code_hash_t, option_reference, option_dereference,
    do_number_hash)

    /* DHCP Option names, formats and codes, from RFC1533.

       Format codes:

       I - IPv4 address
       6 - IPv6 address
       l - 32-bit signed integer
       L - 32-bit unsigned integer
       s - 16-bit signed integer
       S - 16-bit unsigned integer
       b - 8-bit signed integer
       B - 8-bit unsigned integer
       t - ASCII text
       T - Lease Time, 32-bit unsigned integer implying a number of seconds from
       some event.  The special all-ones value means 'infinite'.  May either
       be printed as a decimal, eg, "3600", or as this name, eg, "infinite".
       f - flag (true or false)
       A - array of whatever precedes (e.g., IA means array of IP addresses)
       a - array of the preceding character (e.g., IIa means two or more IP
       addresses)
       U - name of an option space (universe)
       F - implicit flag - the presence of the option indicates that the
       flag is true.
       o - the preceding value is optional.
       E - encapsulation, string or colon-separated hex list (the latter
       two for parsing).   E is followed by a text string containing
       the name of the option space to encapsulate, followed by a '.'.
       If the E is immediately followed by '.', the applicable vendor
       option space is used if one is defined.
       e - If an encapsulation directive is not the first thing in the string,
       the option scanner requires an efficient way to find the encapsulation.
       This is done by placing a 'e' at the beginning of the option.   The
       'e' has no other purpose, and is not required if 'E' is the first
       thing in the option.
       X - either an ASCII string or binary data.   On output, the string is
       scanned to see if it's printable ASCII and, if so, output as a
       quoted string.   If not, it's output as colon-separated hex.   On
       input, the option can be specified either as a quoted string or as
       a colon-separated hex list.
       N - enumeration.   N is followed by a text string containing
       the name of the set of enumeration values to parse or emit,
       followed by a '.'.   The width of the data is specified in the
       named enumeration.   Named enumerations are tracked in parse.c.
       d - Domain name (i.e., FOO or FOO.BAR).
       D - Domain list (i.e., example.com eng.example.com)
       c - When following a 'D' atom, enables compression pointers.
       Z - Zero-length option
       */

    struct universe dhcp_universe;
    static struct option dhcp_options[] = {
        { "subnet-mask", "I",			&dhcp_universe,   1, 1 },
        { "time-offset", "l",			&dhcp_universe,   2, 1 },
        { "routers", "IA",			&dhcp_universe,   3, 1 },
        { "time-servers", "IA",			&dhcp_universe,   4, 1 },
        { "ien116-name-servers", "IA",		&dhcp_universe,   5, 1 },
        { "domain-name-servers", "IA",		&dhcp_universe,   6, 1 },
        { "log-servers", "IA",			&dhcp_universe,   7, 1 },
        { "cookie-servers", "IA",		&dhcp_universe,   8, 1 },
        { "lpr-servers", "IA",			&dhcp_universe,   9, 1 },
        { "impress-servers", "IA",		&dhcp_universe,  10, 1 },
        { "resource-location-servers", "IA",	&dhcp_universe,  11, 1 },
        { "host-name", "t",			&dhcp_universe,  12, 1 },
        { "boot-size", "S",			&dhcp_universe,  13, 1 },
        { "merit-dump", "t",			&dhcp_universe,  14, 1 },
        { "domain-name", "t",			&dhcp_universe,  15, 1 },
        { "swap-server", "I",			&dhcp_universe,  16, 1 },
        { "root-path", "t",			&dhcp_universe,  17, 1 },
        { "extensions-path", "t",		&dhcp_universe,  18, 1 },
        { "ip-forwarding", "f",			&dhcp_universe,  19, 1 },
        { "non-local-source-routing", "f",	&dhcp_universe,  20, 1 },
        { "policy-filter", "IIA",		&dhcp_universe,  21, 1 },
        { "max-dgram-reassembly", "S",		&dhcp_universe,  22, 1 },
        { "default-ip-ttl", "B",		&dhcp_universe,  23, 1 },
        { "path-mtu-aging-timeout", "L",	&dhcp_universe,  24, 1 },
        { "path-mtu-plateau-table", "SA",	&dhcp_universe,  25, 1 },
        { "interface-mtu", "S",			&dhcp_universe,  26, 1 },
        { "all-subnets-local", "f",		&dhcp_universe,  27, 1 },
        { "broadcast-address", "I",		&dhcp_universe,  28, 1 },
        { "perform-mask-discovery", "f",	&dhcp_universe,  29, 1 },
        { "mask-supplier", "f",			&dhcp_universe,  30, 1 },
        { "router-discovery", "f",		&dhcp_universe,  31, 1 },
        { "router-solicitation-address", "I",	&dhcp_universe,  32, 1 },
        { "static-routes", "IIA",		&dhcp_universe,  33, 1 },
        { "trailer-encapsulation", "f",		&dhcp_universe,  34, 1 },
        { "arp-cache-timeout", "L",		&dhcp_universe,  35, 1 },
        { "ieee802-3-encapsulation", "f",	&dhcp_universe,  36, 1 },
        { "default-tcp-ttl", "B",		&dhcp_universe,  37, 1 },
        { "tcp-keepalive-interval", "L",	&dhcp_universe,  38, 1 },
        { "tcp-keepalive-garbage", "f",		&dhcp_universe,  39, 1 },
        { "nis-domain", "t",			&dhcp_universe,  40, 1 },
        { "nis-servers", "IA",			&dhcp_universe,  41, 1 },
        { "ntp-servers", "IA",			&dhcp_universe,  42, 1 },
        { "vendor-encapsulated-options", "E.",	&dhcp_universe,  43, 1 },
        { "netbios-name-servers", "IA",		&dhcp_universe,  44, 1 },
        { "netbios-dd-server", "IA",		&dhcp_universe,  45, 1 },
        { "netbios-node-type", "B",		&dhcp_universe,  46, 1 },
        { "netbios-scope", "t",			&dhcp_universe,  47, 1 },
        { "font-servers", "IA",			&dhcp_universe,  48, 1 },
        { "x-display-manager", "IA",		&dhcp_universe,  49, 1 },
        { "dhcp-requested-address", "I",	&dhcp_universe,  50, 1 },
        { "dhcp-lease-time", "L",		&dhcp_universe,  51, 1 },
        { "dhcp-option-overload", "B",		&dhcp_universe,  52, 1 },
        { "dhcp-message-type", "B",		&dhcp_universe,  53, 1 },
        { "dhcp-server-identifier", "I",	&dhcp_universe,  54, 1 },
        { "dhcp-parameter-request-list", "BA",	&dhcp_universe,  55, 1 },
        { "dhcp-message", "t",			&dhcp_universe,  56, 1 },
        { "dhcp-max-message-size", "S",		&dhcp_universe,  57, 1 },
        { "dhcp-renewal-time", "L",		&dhcp_universe,  58, 1 },
        { "dhcp-rebinding-time", "L",		&dhcp_universe,  59, 1 },
        { "vendor-class-identifier", "X",	&dhcp_universe,  60, 1 },
        { "dhcp-client-identifier", "X",	&dhcp_universe,  61, 1 },
        { "nwip-domain", "t",			&dhcp_universe,  62, 1 },
        { "nwip-suboptions", "Enwip.",		&dhcp_universe,  63, 1 },
        { "nisplus-domain", "t",		&dhcp_universe,  64, 1 },
        { "nisplus-servers", "IA",		&dhcp_universe,  65, 1 },
        { "tftp-server-name", "t",		&dhcp_universe,  66, 1 },
        { "bootfile-name", "t",			&dhcp_universe,  67, 1 },
        { "mobile-ip-home-agent", "IA",		&dhcp_universe,  68, 1 },
        { "smtp-server", "IA",			&dhcp_universe,  69, 1 },
        { "pop-server", "IA",			&dhcp_universe,  70, 1 },
        { "nntp-server", "IA",			&dhcp_universe,  71, 1 },
        { "www-server", "IA",			&dhcp_universe,  72, 1 },
        { "finger-server", "IA",		&dhcp_universe,  73, 1 },
        { "irc-server", "IA",			&dhcp_universe,  74, 1 },
        { "streettalk-server", "IA",		&dhcp_universe,  75, 1 },
        { "streettalk-directory-assistance-server", "IA",
            &dhcp_universe,  76, 1 },
        { "user-class", "t",			&dhcp_universe,  77, 1 },
        { "slp-directory-agent", "fIa",		&dhcp_universe,  78, 1 },
        { "slp-service-scope", "fto",		&dhcp_universe,  79, 1 },
        /* 80 is the zero-length rapid-commit (RFC 4039) */
        { "fqdn", "Efqdn.",			&dhcp_universe,  81, 1 },
        { "relay-agent-information", "Eagent.",	&dhcp_universe,  82, 1 },
        /* 83 is iSNS (RFC 4174) */
        /* 84 is unassigned */
        { "nds-servers", "IA",			&dhcp_universe,  85, 1 },
        { "nds-tree-name", "t",			&dhcp_universe,  86, 1 },
        { "nds-context", "t",			&dhcp_universe,  87, 1 },

        /* Note: RFC4280 fails to identify if the DHCPv4 option is to use
         * compression pointers or not.  Assume not.
         */
        { "bcms-controller-names", "D",		&dhcp_universe,  88, 1 },
        { "bcms-controller-address", "Ia",	&dhcp_universe,  89, 1 },

        /* 90 is the authentication option (RFC 3118) */

        { "client-last-transaction-time", "L",  &dhcp_universe,  91, 1 },
        { "associated-ip", "Ia",                &dhcp_universe,  92, 1 },
#if 0
        /* Defined by RFC 4578 */
        { "pxe-system-type", "S",		&dhcp_universe,  93, 1 },
        { "pxe-interface-id", "BBB",		&dhcp_universe,  94, 1 },
        { "pxe-client-id", "BX",		&dhcp_universe,  97, 1 },
#endif
        { "uap-servers", "t",			&dhcp_universe,  98, 1 },
        { "netinfo-server-address", "Ia",	&dhcp_universe, 112, 1 },
        { "netinfo-server-tag", "t",		&dhcp_universe, 113, 1 },
        { "default-url", "t",			&dhcp_universe, 114, 1 },
        { "subnet-selection", "I",		&dhcp_universe, 118, 1 },
        { "domain-search", "Dc",		&dhcp_universe, 119, 1 },
        { "vivco", "Evendor-class.",		&dhcp_universe, 124, 1 },
        { "vivso", "Evendor.",			&dhcp_universe, 125, 1 },
#if 0
        /* Referenced by RFC 4578.
         * DO NOT UNCOMMENT THESE DEFINITIONS: these names are placeholders
         * and will not be used in future versions of the software.
         */
        { "pxe-undefined-1", "X",		&dhcp_universe, 128, 1 },
        { "pxe-undefined-2", "X",		&dhcp_universe, 129, 1 },
        { "pxe-undefined-3", "X",		&dhcp_universe, 130, 1 },
        { "pxe-undefined-4", "X",		&dhcp_universe, 131, 1 },
        { "pxe-undefined-5", "X",		&dhcp_universe, 132, 1 },
        { "pxe-undefined-6", "X",		&dhcp_universe, 133, 1 },
        { "pxe-undefined-7", "X",		&dhcp_universe, 134, 1 },
        { "pxe-undefined-8", "X",		&dhcp_universe, 135, 1 },
#endif
#if 0
        /* Not defined by RFC yet */
        { "tftp-server-address", "Ia",		&dhcp_universe, 150, 1 },
#endif
#if 0
        /* PXELINUX options: defined by RFC 5071 */
        { "pxelinux-magic", "BBBB",		&dhcp_universe, 208, 1 },
        { "loader-configfile", "t",		&dhcp_universe, 209, 1 },
        { "loader-pathprefix", "t",		&dhcp_universe, 210, 1 },
        { "loader-reboottime", "L",		&dhcp_universe, 211, 1 },
#endif
#if 0
        /* Not defined by RFC yet */
        { "vss-info", "BX",			&dhcp_universe, 221, 1 },
#endif
        { NULL, NULL, NULL, 0, 0 }
    };

struct universe nwip_universe;
static struct option nwip_options[] = {
    { "illegal-1", "",			&nwip_universe,   1, 1 },
    { "illegal-2", "",			&nwip_universe,   2, 1 },
    { "illegal-3", "",			&nwip_universe,   3, 1 },
    { "illegal-4", "",			&nwip_universe,   4, 1 },
    { "nsq-broadcast", "f",			&nwip_universe,   5, 1 },
    { "preferred-dss", "IA",		&nwip_universe,   6, 1 },
    { "nearest-nwip-server", "IA",		&nwip_universe,   7, 1 },
    { "autoretries", "B",			&nwip_universe,   8, 1 },
    { "autoretry-secs", "B",		&nwip_universe,   9, 1 },
    { "nwip-1-1", "f",			&nwip_universe,  10, 1 },
    { "primary-dss", "I",			&nwip_universe,  11, 1 },
    { NULL, NULL, NULL, 0, 0 }
};

/* Note that the "FQDN suboption space" does not reflect the FQDN option
 * format - rather, this is a handy "virtualization" of a flat option
 * which makes manual configuration and presentation of some of its
 * contents easier (each of these suboptions is a fixed-space field within
 * the fqdn contents - domain and host names are derived from a common field,
 * and differ in the left and right hand side of the leftmost dot, fqdn is
 * the combination of the two).
 *
 * Note further that the DHCPv6 and DHCPv4 'fqdn' options use the same
 * virtualized option space to store their work.
 */

struct universe fqdn_universe;
struct universe fqdn6_universe;
static struct option fqdn_options[] = {
    { "no-client-update", "f",		&fqdn_universe,   1, 1 },
    { "server-update", "f",			&fqdn_universe,   2, 1 },
    { "encoded", "f",			&fqdn_universe,   3, 1 },
    { "rcode1", "B",			&fqdn_universe,   4, 1 },
    { "rcode2", "B",			&fqdn_universe,   5, 1 },
    { "hostname", "t",			&fqdn_universe,   6, 1 },
    { "domainname", "t",			&fqdn_universe,   7, 1 },
    { "fqdn", "t",				&fqdn_universe,   8, 1 },
    { NULL, NULL, NULL, 0, 0 }
};

struct universe vendor_class_universe;
static struct option vendor_class_options[] =  {
    { "isc", "X",			&vendor_class_universe,      2495, 1 },
    { NULL, NULL, NULL, 0, 0 }
};

struct universe vendor_universe;
static struct option vendor_options[] = {
    { "isc", "Eisc.",		&vendor_universe,            2495, 1 },
    { NULL, NULL, NULL, 0, 0 }
};

struct universe isc_universe;
static struct option isc_options [] = {
    { "media", "t",				&isc_universe,   1, 1 },
    { "update-assist", "X",			&isc_universe,   2, 1 },
    { NULL,	NULL, NULL, 0, 0 }
};

struct universe dhcpv6_universe;
static struct option dhcpv6_options[] = {

    /* RFC3315 OPTIONS */

    /* Client and server DUIDs are opaque fields, but marking them
     * up somewhat makes configuration easier.
     */
    { "client-id", "X",			&dhcpv6_universe,  1, 1 },
    { "server-id", "X",			&dhcpv6_universe,  2, 1 },

    /* ia-* options actually have at their ends a space for options
     * that are specific to this instance of the option.  We can not
     * handle this yet at this stage of development, so the encoding
     * of these options is unspecified ("X").
     */
    { "ia-na", "X",				&dhcpv6_universe,  3, 1 },
    { "ia-ta", "X",				&dhcpv6_universe,  4, 1 },
    { "ia-addr", "X",			&dhcpv6_universe,  5, 1 },

    /* "oro" is DHCPv6 speak for "parameter-request-list" */
    { "oro", "SA",				&dhcpv6_universe,  6, 1 },

    { "preference", "B",			&dhcpv6_universe,  7, 1 },
    { "elapsed-time", "S",			&dhcpv6_universe,  8, 1 },
    { "relay-msg", "X",			&dhcpv6_universe,  9, 1 },

    /* Option code 10 is curiously unassigned. */
#if 0
    /* XXX: missing suitable atoms for the auth option.  We may want
     * to 'virtually encapsulate' this option a la the fqdn option
     * seeing as it is processed explicitly by the server and unlikely
     * to be configured by hand by users as such.
     */
    { "auth", "Nauth-protocol.Nauth-algorithm.Nrdm-type.LLX",
        &dhcpv6_universe, 11, 1 },
#endif
    { "unicast", "6",			&dhcpv6_universe, 12, 1 },
    { "status-code", "Nstatus-codes.to",	&dhcpv6_universe, 13, 1 },
    { "rapid-commit", "Z",			&dhcpv6_universe, 14, 1 },
#if 0
    /* XXX: user-class contents are of the form "StA" where the
     * integer describes the length of the text field.  We don't have
     * an atom for pre-determined-length octet strings yet, so we
     * can't quite do these two.
     */
    { "user-class", "X",			&dhcpv6_universe, 15, 1 },
    { "vendor-class", "X",			&dhcpv6_universe, 16, 1 },
#endif
    { "vendor-opts", "Evsio.",		&dhcpv6_universe, 17, 1 },
    { "interface-id", "X",			&dhcpv6_universe, 18, 1 },
    { "reconf-msg", "Ndhcpv6-messages.",	&dhcpv6_universe, 19, 1 },
    { "reconf-accept", "Z",			&dhcpv6_universe, 20, 1 },

    /* RFC3319 OPTIONS */

    /* Of course: we would HAVE to have a different atom for
     * domain names without compression.  Typical.
     */
    { "sip-servers-names", "D",		&dhcpv6_universe, 21, 1 },
    { "sip-servers-addresses", "6A",	&dhcpv6_universe, 22, 1 },

    /* RFC3646 OPTIONS */

    { "name-servers", "6A",			&dhcpv6_universe, 23, 1 },
    { "domain-search", "D",			&dhcpv6_universe, 24, 1 },

    /* RFC3633 OPTIONS */

    { "ia-pd", "X",				&dhcpv6_universe, 25, 1 },
    { "ia-prefix", "X",			&dhcpv6_universe, 26, 1 },

    /* RFC3898 OPTIONS */

    { "nis-servers", "6A", 			&dhcpv6_universe, 27, 1 },
    { "nisp-servers", "6A",			&dhcpv6_universe, 28, 1 },
    { "nis-domain-name", "D",		&dhcpv6_universe, 29, 1 },
    { "nisp-domain-name", "D",		&dhcpv6_universe, 30, 1 },

    /* RFC4075 OPTIONS */
    { "sntp-servers", "6A",			&dhcpv6_universe, 31, 1 },

    /* RFC4242 OPTIONS */

    { "info-refresh-time", "T",		&dhcpv6_universe, 32, 1 },

    /* RFC4280 OPTIONS */

    { "bcms-server-d", "D",			&dhcpv6_universe, 33, 1 },
    { "bcms-server-a", "6A",		&dhcpv6_universe, 34, 1 },

    /* Note that 35 is not assigned. */

    /* Not yet considering for inclusion. */
#if 0
    /* RFC4776 OPTIONS */

    { "geoconf-civic", "X",			&dhcpv6_universe, 36, 1 },
#endif

    /* RFC4649 OPTIONS */

    /* The remote-id option looks like the VSIO option, but for all
     * intents and purposes we only need to treat the entire field
     * like a globally unique identifier (and if we create such an
     * option, ensure the first 4 bytes are our enterprise-id followed
     * by a globally unique ID so long as you're within that enterprise
     * id).  So we'll use "X" for now unless someone grumbles.
     */
    { "remote-id", "X",			&dhcpv6_universe, 37, 1 },

    /* RFC4580 OPTIONS */

    { "subscriber-id", "X",			&dhcpv6_universe, 38, 1 },

    /* RFC4704 OPTIONS */

    /* The DHCPv6 FQDN option is...weird.
     *
     * We use the same "virtual" encapsulated space as DHCPv4's FQDN
     * option, so it can all be configured in one place.  Since the
     * options system does not support multiple inheritance, we use
     * a 'shill' layer to perform the different protocol conversions,
     * and to redirect any queries in the DHCPv4 FQDN's space.
     */
    { "fqdn", "Efqdn6-if-you-see-me-its-a-bug-bug-bug.",
        &dhcpv6_universe, 39, 1 },

    /* Not yet considering for inclusion. */
#if 0
    /* draft-ietf-dhc-paa-option-05 */
    { "pana-agent", "6A",			&dhcpv6_universe, 40, 1 },

    /* RFC4833 OPTIONS */

    { "new-posix-timezone", "t",		&dhcpv6_universe, 41, 1 },
    { "new-tzdb-timezone", "t",		&dhcpv6_universe, 42, 1 },

    /* RFC4994 OPTIONS */

    { "ero", "SA",				&dhcpv6_universe, 43, 1 },
#endif

    /* RFC5007 OPTIONS */

    { "lq-query", "X",			&dhcpv6_universe, 44, 1 },
    { "client-data", "X",			&dhcpv6_universe, 45, 1 },
    { "clt-time", "L",			&dhcpv6_universe, 46, 1 },
    { "lq-relay-data", "6X",		&dhcpv6_universe, 47, 1 },
    { "lq-client-link", "6A",		&dhcpv6_universe, 48, 1 },

    { NULL, NULL, NULL, 0, 0 }
};

struct enumeration_value dhcpv6_duid_type_values[] = {
    { "duid-llt",	DUID_LLT }, /* Link-Local Plus Time */
    { "duid-en",	DUID_EN },  /* DUID based upon enterprise-ID. */
    { "duid-ll",	DUID_LL },  /* DUID from Link Local address only. */
    { NULL, 0 }
};

struct enumeration dhcpv6_duid_types = {
    NULL,
    "duid-types", 2,
    dhcpv6_duid_type_values
};

struct enumeration_value dhcpv6_status_code_values[] = {
    { "success",	  0 }, /* Success				*/
    { "UnspecFail",	  1 }, /* Failure, for unspecified reasons.	*/
    { "NoAddrsAvail", 2 }, /* Server has no addresses to assign.	*/
    { "NoBinding",	  3 }, /* Client record (binding) unavailable.	*/
    { "NotOnLink",	  4 }, /* Bad prefix for the link.		*/
    { "UseMulticast", 5 }, /* Not just good advice.  It's the law.	*/
    { "NoPrefixAvail", 6 }, /* Server has no prefixes to assign.	*/
    { "UnknownQueryType", 7 }, /* Query-type unknown/unsupported.	*/
    { "MalformedQuery", 8 }, /* Leasequery not valid.		*/
    { "NotConfigured", 9 }, /* The target address is not in config.	*/
    { "NotAllowed",  10 }, /* Server doesn't allow the leasequery.	*/
    { NULL, 0 }
};

struct enumeration dhcpv6_status_codes = {
    NULL,
    "status-codes", 2,
    dhcpv6_status_code_values
};

struct enumeration_value lq6_query_type_values[] = {
    { "query-by-address", 1 },
    { "query-by-clientid", 2 },
    { NULL, 0 }
};

struct enumeration lq6_query_types = {
    NULL,
    "query-types", 2,
    lq6_query_type_values
};

struct enumeration_value dhcpv6_message_values[] = {
    { "SOLICIT", 1 },
    { "ADVERTISE", 2 },
    { "REQUEST", 3 },
    { "CONFIRM", 4 },
    { "RENEW", 5 },
    { "REBIND", 6 },
    { "REPLY", 7 },
    { "RELEASE", 8 },
    { "DECLINE", 9 },
    { "RECONFIGURE", 10 },
    { "INFORMATION-REQUEST", 11 },
    { "RELAY-FORW", 12 },
    { "RELAY-REPL", 13 },
    { "LEASEQUERY", 14 },
    { "LEASEQUERY-REPLY", 15 },
    { NULL, 0 }
};

/* Some code refers to a different table. */
const char *dhcpv6_type_names[] = {
    NULL,
    "Solicit",
    "Advertise",
    "Request",
    "Confirm",
    "Renew",
    "Rebind",
    "Reply",
    "Release",
    "Decline",
    "Reconfigure",
    "Information-request",
    "Relay-forward",
    "Relay-reply",
    "Leasequery",
    "Leasequery-reply"
};
const int dhcpv6_type_name_max =
(sizeof(dhcpv6_type_names) / sizeof(dhcpv6_type_names[0]));

struct enumeration dhcpv6_messages = {
    NULL,
    "dhcpv6-messages", 1,
    dhcpv6_message_values
};

struct universe vsio_universe;
static struct option vsio_options[] = {
    { "isc", "Eisc6.",		&vsio_universe,		     2495, 1 },
    { NULL, NULL, NULL, 0, 0 }
};

struct universe isc6_universe;
static struct option isc6_options[] = {
    { "media", "t",				&isc6_universe,     1, 1 },
    { "update-assist", "X",			&isc6_universe,	    2, 1 },
    { NULL, NULL, NULL, 0, 0 }
};

const char *hardware_types [] = {
    "unknown-0",
    "ethernet",
    "unknown-2",
    "unknown-3",
    "unknown-4",
    "unknown-5",
    "token-ring",
    "unknown-7",
    "fddi",
    "unknown-9",
    "unknown-10",
    "unknown-11",
    "unknown-12",
    "unknown-13",
    "unknown-14",
    "unknown-15",
    "unknown-16",
    "unknown-17",
    "unknown-18",
    "unknown-19",
    "unknown-20",
    "unknown-21",
    "unknown-22",
    "unknown-23",
    "unknown-24",
    "unknown-25",
    "unknown-26",
    "unknown-27",
    "unknown-28",
    "unknown-29",
    "unknown-30",
    "unknown-31",
    "unknown-32",
    "unknown-33",
    "unknown-34",
    "unknown-35",
    "unknown-36",
    "unknown-37",
    "unknown-38",
    "unknown-39",
    "unknown-40",
    "unknown-41",
    "unknown-42",
    "unknown-43",
    "unknown-44",
    "unknown-45",
    "unknown-46",
    "unknown-47",
    "unknown-48",
    "unknown-49",
    "unknown-50",
    "unknown-51",
    "unknown-52",
    "unknown-53",
    "unknown-54",
    "unknown-55",
    "unknown-56",
    "unknown-57",
    "unknown-58",
    "unknown-59",
    "unknown-60",
    "unknown-61",
    "unknown-62",
    "unknown-63",
    "unknown-64",
    "unknown-65",
    "unknown-66",
    "unknown-67",
    "unknown-68",
    "unknown-69",
    "unknown-70",
    "unknown-71",
    "unknown-72",
    "unknown-73",
    "unknown-74",
    "unknown-75",
    "unknown-76",
    "unknown-77",
    "unknown-78",
    "unknown-79",
    "unknown-80",
    "unknown-81",
    "unknown-82",
    "unknown-83",
    "unknown-84",
    "unknown-85",
    "unknown-86",
    "unknown-87",
    "unknown-88",
    "unknown-89",
    "unknown-90",
    "unknown-91",
    "unknown-92",
    "unknown-93",
    "unknown-94",
    "unknown-95",
    "unknown-96",
    "unknown-97",
    "unknown-98",
    "unknown-99",
    "unknown-100",
    "unknown-101",
    "unknown-102",
    "unknown-103",
    "unknown-104",
    "unknown-105",
    "unknown-106",
    "unknown-107",
    "unknown-108",
    "unknown-109",
    "unknown-110",
    "unknown-111",
    "unknown-112",
    "unknown-113",
    "unknown-114",
    "unknown-115",
    "unknown-116",
    "unknown-117",
    "unknown-118",
    "unknown-119",
    "unknown-120",
    "unknown-121",
    "unknown-122",
    "unknown-123",
    "unknown-124",
    "unknown-125",
    "unknown-126",
    "unknown-127",
    "unknown-128",
    "unknown-129",
    "unknown-130",
    "unknown-131",
    "unknown-132",
    "unknown-133",
    "unknown-134",
    "unknown-135",
    "unknown-136",
    "unknown-137",
    "unknown-138",
    "unknown-139",
    "unknown-140",
    "unknown-141",
    "unknown-142",
    "unknown-143",
    "unknown-144",
    "unknown-145",
    "unknown-146",
    "unknown-147",
    "unknown-148",
    "unknown-149",
    "unknown-150",
    "unknown-151",
    "unknown-152",
    "unknown-153",
    "unknown-154",
    "unknown-155",
    "unknown-156",
    "unknown-157",
    "unknown-158",
    "unknown-159",
    "unknown-160",
    "unknown-161",
    "unknown-162",
    "unknown-163",
    "unknown-164",
    "unknown-165",
    "unknown-166",
    "unknown-167",
    "unknown-168",
    "unknown-169",
    "unknown-170",
    "unknown-171",
    "unknown-172",
    "unknown-173",
    "unknown-174",
    "unknown-175",
    "unknown-176",
    "unknown-177",
    "unknown-178",
    "unknown-179",
    "unknown-180",
    "unknown-181",
    "unknown-182",
    "unknown-183",
    "unknown-184",
    "unknown-185",
    "unknown-186",
    "unknown-187",
    "unknown-188",
    "unknown-189",
    "unknown-190",
    "unknown-191",
    "unknown-192",
    "unknown-193",
    "unknown-194",
    "unknown-195",
    "unknown-196",
    "unknown-197",
    "unknown-198",
    "unknown-199",
    "unknown-200",
    "unknown-201",
    "unknown-202",
    "unknown-203",
    "unknown-204",
    "unknown-205",
    "unknown-206",
    "unknown-207",
    "unknown-208",
    "unknown-209",
    "unknown-210",
    "unknown-211",
    "unknown-212",
    "unknown-213",
    "unknown-214",
    "unknown-215",
    "unknown-216",
    "unknown-217",
    "unknown-218",
    "unknown-219",
    "unknown-220",
    "unknown-221",
    "unknown-222",
    "unknown-223",
    "unknown-224",
    "unknown-225",
    "unknown-226",
    "unknown-227",
    "unknown-228",
    "unknown-229",
    "unknown-230",
    "unknown-231",
    "unknown-232",
    "unknown-233",
    "unknown-234",
    "unknown-235",
    "unknown-236",
    "unknown-237",
    "unknown-238",
    "unknown-239",
    "unknown-240",
    "unknown-241",
    "unknown-242",
    "unknown-243",
    "unknown-244",
    "unknown-245",
    "unknown-246",
    "unknown-247",
    "unknown-248",
    "unknown-249",
    "unknown-250",
    "unknown-251",
    "unknown-252",
    "unknown-253",
    "unknown-254",
    "unknown-255" };

universe_hash_t *universe_hash;
struct universe **universes;
int universe_count, universe_max;

/* Universe containing names of configuration options, which, rather than
   writing "option universe-name.option-name ...;", can be set by writing
   "option-name ...;". */

struct universe *config_universe;

/* XXX: omapi must die...all the below keeps us from having to make the
 * option structures omapi typed objects, which is a bigger headache.
 */

char *default_option_format = (char *) "X";

/* Must match hash_reference/dereference types in omapip/hash.h. */
int
option_reference(struct option **dest, struct option *src,
    const char * file, int line)
{
    if (!dest || !src)
        return ISC_R_INVALIDARG;

    if (*dest) {
#if defined(POINTER_DEBUG)
        log_fatal("%s(%d): reference store into non-null pointer!",
            file, line);
#else
        return ISC_R_INVALIDARG;
#endif
    }

    *dest = src;
    src->refcnt++;
    rc_register(file, line, dest, src, src->refcnt, 0, RC_MISC);
    return(ISC_R_SUCCESS);
}

int
option_dereference(struct option **dest, const char *file, int line)
{
    if (!dest)
        return ISC_R_INVALIDARG;

    if (!*dest) {
#if defined (POINTER_DEBUG)
        log_fatal("%s(%d): dereference of null pointer!", file, line);
#else
        return ISC_R_INVALIDARG;
#endif
    }

    if ((*dest)->refcnt <= 0) {
#if defined (POINTER_DEBUG)
        log_fatal("%s(%d): dereference of <= 0 refcnt!", file, line);
#else
        return ISC_R_INVALIDARG;
#endif
    }

    (*dest)->refcnt--;

    rc_register(file, line, dest, (*dest), (*dest)->refcnt, 1, RC_MISC);

    if ((*dest)->refcnt == 0) {
        /* The option name may be packed in the same alloc as the
         * option structure.
         */
        if ((char *) (*dest)->name != (char *) ((*dest) + 1))
            dfree((char *) (*dest)->name, file, line);

        /* It's either a user-configured format (allocated), or the
         * default static format.
         */
        if (((*dest)->format != NULL) &&
            ((*dest)->format != default_option_format)) {
            dfree((char *) (*dest)->format, file, line);
        }

        dfree(*dest, file, line);
    }

    *dest = NULL;
    return ISC_R_SUCCESS;
}

void initialize_common_option_spaces()
{
    unsigned code;
    int i;

    /* The 'universes' table is dynamically grown to contain
     * universe as they're configured - except during startup.
     * Since we know how many we put down in .c files, we can
     * allocate a more-than-right-sized buffer now, leaving some
     * space for user-configured option spaces.
     *
     * 1: dhcp_universe (dhcpv4 options)
     * 2: nwip_universe (dhcpv4 NWIP option)
     * 3: fqdn_universe (dhcpv4 fqdn option - reusable for v6)
     * 4: vendor_class_universe (VIVCO)
     * 5: vendor_universe (VIVSO)
     * 6: isc_universe (dhcpv4 isc config space)
     * 7: dhcpv6_universe (dhcpv6 options)
     * 8: vsio_universe (DHCPv6 Vendor-Identified space)
     * 9: isc6_universe (ISC's Vendor universe in DHCPv6 VSIO)
     * 10: fqdn6_universe (dhcpv6 fqdn option shill to v4)
     * 11: agent_universe (dhcpv4 relay agent - see server/stables.c)
     * 12: server_universe (server's config, see server/stables.c)
     * 13: user-config
     * 14: more user-config
     * 15: more user-config
     * 16: more user-config
     */
    universe_max = 16;
    i = universe_max * sizeof(struct universe *);
    if (i <= 0)
        log_fatal("Ludicrous initial size option space table.");
    universes = dmalloc(i, MDL);
    if (universes == NULL)
        log_fatal("Can't allocate option space table.");
    memset(universes, 0, i);

    /* Set up the DHCP option universe... */
    dhcp_universe.name = "dhcp";
    dhcp_universe.concat_duplicates = 1;
    dhcp_universe.lookup_func = lookup_hashed_option;
    dhcp_universe.option_state_dereference =
        hashed_option_state_dereference;
    dhcp_universe.save_func = save_hashed_option;
    dhcp_universe.delete_func = delete_hashed_option;
    dhcp_universe.encapsulate = hashed_option_space_encapsulate;
    dhcp_universe.foreach = hashed_option_space_foreach;
    dhcp_universe.decode = parse_option_buffer;
    dhcp_universe.length_size = 1;
    dhcp_universe.tag_size = 1;
    dhcp_universe.get_tag = getUChar;
    dhcp_universe.store_tag = putUChar;
    dhcp_universe.get_length = getUChar;
    dhcp_universe.store_length = putUChar;
    dhcp_universe.site_code_min = 0;
    dhcp_universe.end = DHO_END;
    dhcp_universe.index = universe_count++;
    universes [dhcp_universe.index] = &dhcp_universe;
    if (!option_name_new_hash(&dhcp_universe.name_hash,
            BYTE_NAME_HASH_SIZE, MDL) ||
        !option_code_new_hash(&dhcp_universe.code_hash,
            BYTE_CODE_HASH_SIZE, MDL))
        log_fatal ("Can't allocate dhcp option hash table.");
    for (i = 0 ; dhcp_options[i].name ; i++) {
        option_code_hash_add(dhcp_universe.code_hash,
            &dhcp_options[i].code, 0,
            &dhcp_options[i], MDL);
        option_name_hash_add(dhcp_universe.name_hash,
            dhcp_options [i].name, 0,
            &dhcp_options [i], MDL);
    }
#if defined(REPORT_HASH_PERFORMANCE)
    log_info("DHCP name hash: %s",
        option_name_hash_report(dhcp_universe.name_hash));
    log_info("DHCP code hash: %s",
        option_code_hash_report(dhcp_universe.code_hash));
#endif

    /* Set up the Novell option universe (for option 63)... */
    nwip_universe.name = "nwip";
    nwip_universe.concat_duplicates = 0; /* XXX: reference? */
    nwip_universe.lookup_func = lookup_linked_option;
    nwip_universe.option_state_dereference =
        linked_option_state_dereference;
    nwip_universe.save_func = save_linked_option;
    nwip_universe.delete_func = delete_linked_option;
    nwip_universe.encapsulate = nwip_option_space_encapsulate;
    nwip_universe.foreach = linked_option_space_foreach;
    nwip_universe.decode = parse_option_buffer;
    nwip_universe.length_size = 1;
    nwip_universe.tag_size = 1;
    nwip_universe.get_tag = getUChar;
    nwip_universe.store_tag = putUChar;
    nwip_universe.get_length = getUChar;
    nwip_universe.store_length = putUChar;
    nwip_universe.site_code_min = 0;
    nwip_universe.end = 0;
    code = DHO_NWIP_SUBOPTIONS;
    nwip_universe.enc_opt = NULL;
    if (!option_code_hash_lookup(&nwip_universe.enc_opt,
            dhcp_universe.code_hash, &code, 0, MDL))
        log_fatal("Unable to find NWIP parent option (%s:%d).", MDL);
    nwip_universe.index = universe_count++;
    universes [nwip_universe.index] = &nwip_universe;
    if (!option_name_new_hash(&nwip_universe.name_hash,
            NWIP_HASH_SIZE, MDL) ||
        !option_code_new_hash(&nwip_universe.code_hash,
            NWIP_HASH_SIZE, MDL))
        log_fatal ("Can't allocate nwip option hash table.");
    for (i = 0 ; nwip_options[i].name ; i++) {
        option_code_hash_add(nwip_universe.code_hash,
            &nwip_options[i].code, 0,
            &nwip_options[i], MDL);
        option_name_hash_add(nwip_universe.name_hash,
            nwip_options[i].name, 0,
            &nwip_options[i], MDL);
    }
#if defined(REPORT_HASH_PERFORMANCE)
    log_info("NWIP name hash: %s",
        option_name_hash_report(nwip_universe.name_hash));
    log_info("NWIP code hash: %s",
        option_code_hash_report(nwip_universe.code_hash));
#endif

    /* Set up the FQDN option universe... */
    fqdn_universe.name = "fqdn";
    fqdn_universe.concat_duplicates = 0;
    fqdn_universe.lookup_func = lookup_linked_option;
    fqdn_universe.option_state_dereference =
        linked_option_state_dereference;
    fqdn_universe.save_func = save_linked_option;
    fqdn_universe.delete_func = delete_linked_option;
    fqdn_universe.encapsulate = fqdn_option_space_encapsulate;
    fqdn_universe.foreach = linked_option_space_foreach;
    fqdn_universe.decode = fqdn_universe_decode;
    fqdn_universe.length_size = 1;
    fqdn_universe.tag_size = 1;
    fqdn_universe.get_tag = getUChar;
    fqdn_universe.store_tag = putUChar;
    fqdn_universe.get_length = getUChar;
    fqdn_universe.store_length = putUChar;
    fqdn_universe.site_code_min = 0;
    fqdn_universe.end = 0;
    fqdn_universe.index = universe_count++;
    code = DHO_FQDN;
    fqdn_universe.enc_opt = NULL;
    if (!option_code_hash_lookup(&fqdn_universe.enc_opt,
            dhcp_universe.code_hash, &code, 0, MDL))
        log_fatal("Unable to find FQDN parent option (%s:%d).", MDL);
    universes [fqdn_universe.index] = &fqdn_universe;
    if (!option_name_new_hash(&fqdn_universe.name_hash,
            FQDN_HASH_SIZE, MDL) ||
        !option_code_new_hash(&fqdn_universe.code_hash,
            FQDN_HASH_SIZE, MDL))
        log_fatal ("Can't allocate fqdn option hash table.");
    for (i = 0 ; fqdn_options[i].name ; i++) {
        option_code_hash_add(fqdn_universe.code_hash,
            &fqdn_options[i].code, 0,
            &fqdn_options[i], MDL);
        option_name_hash_add(fqdn_universe.name_hash,
            fqdn_options[i].name, 0,
            &fqdn_options[i], MDL);
    }
#if defined(REPORT_HASH_PERFORMANCE)
    log_info("FQDN name hash: %s",
        option_name_hash_report(fqdn_universe.name_hash));
    log_info("FQDN code hash: %s",
        option_code_hash_report(fqdn_universe.code_hash));
#endif

    /* Set up the Vendor Identified Vendor Class options (for option
     * 125)...
     */
    vendor_class_universe.name = "vendor-class";
    vendor_class_universe.concat_duplicates = 0; /* XXX: reference? */
    vendor_class_universe.lookup_func = lookup_hashed_option;
    vendor_class_universe.option_state_dereference =
        hashed_option_state_dereference;
    vendor_class_universe.save_func = save_hashed_option;
    vendor_class_universe.delete_func = delete_hashed_option;
    vendor_class_universe.encapsulate = hashed_option_space_encapsulate;
    vendor_class_universe.foreach = hashed_option_space_foreach;
    vendor_class_universe.decode = parse_option_buffer;
    vendor_class_universe.length_size = 1;
    vendor_class_universe.tag_size = 4;
    vendor_class_universe.get_tag = getULong;
    vendor_class_universe.store_tag = putULong;
    vendor_class_universe.get_length = getUChar;
    vendor_class_universe.store_length = putUChar;
    vendor_class_universe.site_code_min = 0;
    vendor_class_universe.end = 0;
    code = DHO_VIVCO_SUBOPTIONS;
    vendor_class_universe.enc_opt = NULL;
    if (!option_code_hash_lookup(&vendor_class_universe.enc_opt,
            dhcp_universe.code_hash, &code, 0, MDL))
        log_fatal("Unable to find VIVCO parent option (%s:%d).", MDL);
    vendor_class_universe.index = universe_count++;
    universes[vendor_class_universe.index] = &vendor_class_universe;
    if (!option_name_new_hash(&vendor_class_universe.name_hash,
            VIVCO_HASH_SIZE, MDL) ||
        !option_code_new_hash(&vendor_class_universe.code_hash,
            VIVCO_HASH_SIZE, MDL))
        log_fatal("Can't allocate Vendor Identified Vendor Class "
            "option hash table.");
    for (i = 0 ; vendor_class_options[i].name ; i++) {
        option_code_hash_add(vendor_class_universe.code_hash,
            &vendor_class_options[i].code, 0,
            &vendor_class_options[i], MDL);
        option_name_hash_add(vendor_class_universe.name_hash,
            vendor_class_options[i].name, 0,
            &vendor_class_options[i], MDL);
    }
#if defined(REPORT_HASH_PERFORMANCE)
    log_info("VIVCO name hash: %s",
        option_name_hash_report(vendor_class_universe.name_hash));
    log_info("VIVCO code hash: %s",
        option_code_hash_report(vendor_class_universe.code_hash));
#endif

    /* Set up the Vendor Identified Vendor Sub-options (option 126)... */
    vendor_universe.name = "vendor";
    vendor_universe.concat_duplicates = 0; /* XXX: reference? */
    vendor_universe.lookup_func = lookup_hashed_option;
    vendor_universe.option_state_dereference =
        hashed_option_state_dereference;
    vendor_universe.save_func = save_hashed_option;
    vendor_universe.delete_func = delete_hashed_option;
    vendor_universe.encapsulate = hashed_option_space_encapsulate;
    vendor_universe.foreach = hashed_option_space_foreach;
    vendor_universe.decode = parse_option_buffer;
    vendor_universe.length_size = 1;
    vendor_universe.tag_size = 4;
    vendor_universe.get_tag = getULong;
    vendor_universe.store_tag = putULong;
    vendor_universe.get_length = getUChar;
    vendor_universe.store_length = putUChar;
    vendor_universe.site_code_min = 0;
    vendor_universe.end = 0;
    code = DHO_VIVSO_SUBOPTIONS;
    vendor_universe.enc_opt = NULL;
    if (!option_code_hash_lookup(&vendor_universe.enc_opt,
            dhcp_universe.code_hash, &code, 0, MDL))
        log_fatal("Unable to find VIVSO parent option (%s:%d).", MDL);
    vendor_universe.index = universe_count++;
    universes[vendor_universe.index] = &vendor_universe;
    if (!option_name_new_hash(&vendor_universe.name_hash,
            VIVSO_HASH_SIZE, MDL) ||
        !option_code_new_hash(&vendor_universe.code_hash,
            VIVSO_HASH_SIZE, MDL))
        log_fatal("Can't allocate Vendor Identified Vendor Sub-"
            "options hash table.");
    for (i = 0 ; vendor_options[i].name ; i++) {
        option_code_hash_add(vendor_universe.code_hash,
            &vendor_options[i].code, 0,
            &vendor_options[i], MDL);
        option_name_hash_add(vendor_universe.name_hash,
            vendor_options[i].name, 0,
            &vendor_options[i], MDL);
    }
#if defined(REPORT_HASH_PERFORMANCE)
    log_info("VIVSO name hash: %s",
        option_name_hash_report(vendor_universe.name_hash));
    log_info("VIVSO code hash: %s",
        option_code_hash_report(vendor_universe.code_hash));
#endif

    /* Set up the ISC Vendor-option universe (for option 125.2495)... */
    isc_universe.name = "isc";
    isc_universe.concat_duplicates = 0; /* XXX: check VIVSO ref */
    isc_universe.lookup_func = lookup_linked_option;
    isc_universe.option_state_dereference =
        linked_option_state_dereference;
    isc_universe.save_func = save_linked_option;
    isc_universe.delete_func = delete_linked_option;
    isc_universe.encapsulate = linked_option_space_encapsulate;
    isc_universe.foreach = linked_option_space_foreach;
    isc_universe.decode = parse_option_buffer;
    isc_universe.length_size = 2;
    isc_universe.tag_size = 2;
    isc_universe.get_tag = getUShort;
    isc_universe.store_tag = putUShort;
    isc_universe.get_length = getUShort;
    isc_universe.store_length = putUShort;
    isc_universe.site_code_min = 0;
    isc_universe.end = 0;
    code = VENDOR_ISC_SUBOPTIONS;
    isc_universe.enc_opt = NULL;
    if (!option_code_hash_lookup(&isc_universe.enc_opt,
            vendor_universe.code_hash, &code, 0, MDL))
        log_fatal("Unable to find ISC parent option (%s:%d).", MDL);
    isc_universe.index = universe_count++;
    universes[isc_universe.index] = &isc_universe;
    if (!option_name_new_hash(&isc_universe.name_hash,
            VIV_ISC_HASH_SIZE, MDL) ||
        !option_code_new_hash(&isc_universe.code_hash,
            VIV_ISC_HASH_SIZE, MDL))
        log_fatal("Can't allocate ISC Vendor options hash table.");
    for (i = 0 ; isc_options[i].name ; i++) {
        option_code_hash_add(isc_universe.code_hash,
            &isc_options[i].code, 0,
            &isc_options[i], MDL);
        option_name_hash_add(isc_universe.name_hash,
            isc_options[i].name, 0,
            &isc_options[i], MDL);
    }
#if defined(REPORT_HASH_PERFORMANCE)
    log_info("ISC name hash: %s",
        option_name_hash_report(isc_universe.name_hash));
    log_info("ISC code hash: %s",
        option_code_hash_report(isc_universe.code_hash));
#endif

    /* Set up the DHCPv6 root universe. */
    dhcpv6_universe.name = "dhcp6";
    dhcpv6_universe.concat_duplicates = 0;
    dhcpv6_universe.lookup_func = lookup_hashed_option;
    dhcpv6_universe.option_state_dereference =
        hashed_option_state_dereference;
    dhcpv6_universe.save_func = save_hashed_option;
    dhcpv6_universe.delete_func = delete_hashed_option;
    dhcpv6_universe.encapsulate = hashed_option_space_encapsulate;
    dhcpv6_universe.foreach = hashed_option_space_foreach;
    dhcpv6_universe.decode = parse_option_buffer;
    dhcpv6_universe.length_size = 2;
    dhcpv6_universe.tag_size = 2;
    dhcpv6_universe.get_tag = getUShort;
    dhcpv6_universe.store_tag = putUShort;
    dhcpv6_universe.get_length = getUShort;
    dhcpv6_universe.store_length = putUShort;
    dhcpv6_universe.site_code_min = 0;
    /* DHCPv6 has no END option. */
    dhcpv6_universe.end = 0x00;
    dhcpv6_universe.index = universe_count++;
    universes[dhcpv6_universe.index] = &dhcpv6_universe;
    if (!option_name_new_hash(&dhcpv6_universe.name_hash,
            WORD_NAME_HASH_SIZE, MDL) ||
        !option_code_new_hash(&dhcpv6_universe.code_hash,
            WORD_CODE_HASH_SIZE, MDL))
        log_fatal("Can't allocate dhcpv6 option hash tables.");
    for (i = 0 ; dhcpv6_options[i].name ; i++) {
        option_code_hash_add(dhcpv6_universe.code_hash,
            &dhcpv6_options[i].code, 0,
            &dhcpv6_options[i], MDL);
        option_name_hash_add(dhcpv6_universe.name_hash,
            dhcpv6_options[i].name, 0,
            &dhcpv6_options[i], MDL);
    }

    /* Add DHCPv6 protocol enumeration sets. */
    add_enumeration(&dhcpv6_duid_types);
    add_enumeration(&dhcpv6_status_codes);
    add_enumeration(&dhcpv6_messages);

    /* Set up DHCPv6 VSIO universe. */
    vsio_universe.name = "vsio";
    vsio_universe.concat_duplicates = 0;
    vsio_universe.lookup_func = lookup_hashed_option;
    vsio_universe.option_state_dereference =
        hashed_option_state_dereference;
    vsio_universe.save_func = save_hashed_option;
    vsio_universe.delete_func = delete_hashed_option;
    vsio_universe.encapsulate = hashed_option_space_encapsulate;
    vsio_universe.foreach = hashed_option_space_foreach;
    vsio_universe.decode = parse_option_buffer;
    vsio_universe.length_size = 0;
    vsio_universe.tag_size = 4;
    vsio_universe.get_tag = getULong;
    vsio_universe.store_tag = putULong;
    vsio_universe.get_length = NULL;
    vsio_universe.store_length = NULL;
    vsio_universe.site_code_min = 0;
    /* No END option. */
    vsio_universe.end = 0x00;
    code = D6O_VENDOR_OPTS;
    if (!option_code_hash_lookup(&vsio_universe.enc_opt,
            dhcpv6_universe.code_hash, &code, 0, MDL))
        log_fatal("Unable to find VSIO parent option (%s:%d).", MDL);
    vsio_universe.index = universe_count++;
    universes[vsio_universe.index] = &vsio_universe;
    if (!option_name_new_hash(&vsio_universe.name_hash,
            VSIO_HASH_SIZE, MDL) ||
        !option_code_new_hash(&vsio_universe.code_hash,
            VSIO_HASH_SIZE, MDL))
        log_fatal("Can't allocate Vendor Specific Information "
            "Options space.");
    for (i = 0 ; vsio_options[i].name != NULL ; i++) {
        option_code_hash_add(vsio_universe.code_hash,
            &vsio_options[i].code, 0,
            &vsio_options[i], MDL);
        option_name_hash_add(vsio_universe.name_hash,
            vsio_options[i].name, 0,
            &vsio_options[i], MDL);
    }

    /* Add ISC VSIO sub-sub-option space. */
    isc6_universe.name = "isc6";
    isc6_universe.concat_duplicates = 0;
    isc6_universe.lookup_func = lookup_hashed_option;
    isc6_universe.option_state_dereference =
        hashed_option_state_dereference;
    isc6_universe.save_func = save_hashed_option;
    isc6_universe.delete_func = delete_hashed_option;
    isc6_universe.encapsulate = hashed_option_space_encapsulate;
    isc6_universe.foreach = hashed_option_space_foreach;
    isc6_universe.decode = parse_option_buffer;
    isc6_universe.length_size = 0;
    isc6_universe.tag_size = 4;
    isc6_universe.get_tag = getULong;
    isc6_universe.store_tag = putULong;
    isc6_universe.get_length = NULL;
    isc6_universe.store_length = NULL;
    isc6_universe.site_code_min = 0;
    /* No END option. */
    isc6_universe.end = 0x00;
    code = 2495;
    if (!option_code_hash_lookup(&isc6_universe.enc_opt,
            vsio_universe.code_hash, &code, 0, MDL))
        log_fatal("Unable to find ISC parent option (%s:%d).", MDL);
    isc6_universe.index = universe_count++;
    universes[isc6_universe.index] = &isc6_universe;
    if (!option_name_new_hash(&isc6_universe.name_hash,
            VIV_ISC_HASH_SIZE, MDL) ||
        !option_code_new_hash(&isc6_universe.code_hash,
            VIV_ISC_HASH_SIZE, MDL))
        log_fatal("Can't allocate Vendor Specific Information "
            "Options space.");
    for (i = 0 ; isc6_options[i].name != NULL ; i++) {
        option_code_hash_add(isc6_universe.code_hash,
            &isc6_options[i].code, 0,
            &isc6_options[i], MDL);
        option_name_hash_add(isc6_universe.name_hash,
            isc6_options[i].name, 0,
            &isc6_options[i], MDL);
    }

    /* The fqdn6 option space is a protocol-wrapper shill for the
     * old DHCPv4 space.
     */
    fqdn6_universe.name = "fqdn6-if-you-see-me-its-a-bug-bug-bug";
    fqdn6_universe.lookup_func = lookup_fqdn6_option;
    fqdn6_universe.option_state_dereference = NULL; /* Covered by v4. */
    fqdn6_universe.save_func = save_fqdn6_option;
    fqdn6_universe.delete_func = delete_fqdn6_option;
    fqdn6_universe.encapsulate = fqdn6_option_space_encapsulate;
    fqdn6_universe.foreach = fqdn6_option_space_foreach;
    fqdn6_universe.decode = fqdn6_universe_decode;
    /* This is not a 'normal' encapsulated space, so these values are
     * meaningless.
     */
    fqdn6_universe.length_size = 0;
    fqdn6_universe.tag_size = 0;
    fqdn6_universe.get_tag = NULL;
    fqdn6_universe.store_tag = NULL;
    fqdn6_universe.get_length = NULL;
    fqdn6_universe.store_length = NULL;
    fqdn6_universe.site_code_min = 0;
    fqdn6_universe.end = 0;
    fqdn6_universe.index = universe_count++;
    code = D6O_CLIENT_FQDN;
    fqdn6_universe.enc_opt = NULL;
    if (!option_code_hash_lookup(&fqdn6_universe.enc_opt,
            dhcpv6_universe.code_hash, &code, 0, MDL))
        log_fatal("Unable to find FQDN v6 parent option. (%s:%d).",
            MDL);
    universes[fqdn6_universe.index] = &fqdn6_universe;
    /* The fqdn6 space shares the same option space as the v4 space.
     * So there are no name or code hashes on the v6 side.
     */
    fqdn6_universe.name_hash = NULL;
    fqdn6_universe.code_hash = NULL;


    /* Set up the hash of DHCPv4 universes. */
    universe_new_hash(&universe_hash, UNIVERSE_HASH_SIZE, MDL);
    universe_hash_add(universe_hash, dhcp_universe.name, 0,
        &dhcp_universe, MDL);
    universe_hash_add(universe_hash, nwip_universe.name, 0,
        &nwip_universe, MDL);
    universe_hash_add(universe_hash, fqdn_universe.name, 0,
        &fqdn_universe, MDL);
    universe_hash_add(universe_hash, vendor_class_universe.name, 0,
        &vendor_class_universe, MDL);
    universe_hash_add(universe_hash, vendor_universe.name, 0,
        &vendor_universe, MDL);
    universe_hash_add(universe_hash, isc_universe.name, 0,
        &isc_universe, MDL);

    /* Set up hashes for DHCPv6 universes. */
    universe_hash_add(universe_hash, dhcpv6_universe.name, 0,
        &dhcpv6_universe, MDL);
    universe_hash_add(universe_hash, vsio_universe.name, 0,
        &vsio_universe, MDL);
    universe_hash_add(universe_hash, isc6_universe.name, 0,
        &isc6_universe, MDL);
    /* This should not be necessary.  Listing here just for consistency.
     *	universe_hash_add(universe_hash, fqdn6_universe.name, 0,
     *			  &fqdn6_universe, MDL);
     */
}
